Active Vibration Control of Rotor: Test Environment with Non-Contact Magnetic Actuator

Kari Tammi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    The goal of this work was to set up a test environment for active vibration control of rotors, to study the dynamics of the system, and to design a control system to control the rotor vibrations. The principal idea was to control vibrations with a non-contacting magnetic actuator without a load-carrying function. The rotor was supported by conventional bearings at its ends. The test environment consisted of a rotor test rig, a magnetic actuator, and a programmable control unit. The test environment was tailored to have a large response when running the rotor close to its bending critical speed. First, damping the system by using a simple velocity-feedback controller was studied. The parameters of the controller were defined experimentally from the measured data. According to the simulations and the experiments performed, the velocity-feedback control system reduced vibration levels significantly. The controller made it possible to run the rotor over the critical speed. Second, a feedforward system, based on an adaptive finite-impulse-response filter, was designed to compensate disturbances due to mass imbalance. The coefficients of the filter were adapted by a least-mean-squares algorithm. The response due to mass imbalance in the rotor was significantly decreased. The simulations and experiments showed that the adaptive filter could be used as a supplementary system to the feedback system.
    Original languageEnglish
    Title of host publicationSmart materials and structures
    Subtitle of host publicationVTT Research Programme 2000-2002
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    ISBN (Electronic)951-38-6279-8
    ISBN (Print)951-38-6278-X
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    EventSmart materials and structures: VTT Research Program 2000–2002 - Espoo, Finland
    Duration: 4 Dec 20024 Dec 2002

    Publication series

    SeriesVTT Symposium


    SeminarSmart materials and structures


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